Consider a Region of Space Where the Electric Field Is $|\vec{E}|$

Consider a region of space where the electric field is uniform with magnitude $|\vec{E}|$ , as shown below.

What is the value of the specified potential difference in each case?
(a) $\phi_{B}-\phi_{A}$ ?
(b) $\phi_{C}-\phi_{B}$ ?
(c) $\phi_{A}-\phi_{C}$ ?
Select your responses from the following choices:
A. $+|\vec{E}| h$
B. $-|\vec{E}| h$
C. $+|\vec{E}| w$
D. $-|\vec{E}| w$
E. $+|\vec{E}| \sqrt{h^{2}+w^{2}}$
F. $-|\vec{E}| \sqrt{h^{2}+w^{2}}$
T. zero